Electrical characteristics

ST72682

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7.6.2

Electromagnetic Interference (EMI)

Based on a simple application running on the product (toggling 2 LEDs through the I/O

ports), the product is monitored in terms of emission. This emission test is in line with the

norm SAE J 1752/3 which specifies the board and the loading of each pin.

7.6.3

Absolute Maximum Ratings (Electrical Sensitivity)

Based on three different tests (ESD, LU and DLU) using specific measurement methods, the

product is stressed in order to determine its performance in terms of electrical sensitivity.

For more details, refer to the application note AN1181.

Electrostatic Discharge (ESD)

Electrostatic discharges (a positive then a negative pulse separated by 1 second) are

applied to the pins of each sample according to each pin combination. The sample size

depends on the number of supply pins in the device (3 parts*(n+1) supply pin). This test

conforms to the JESD22-A114A/A115A standard.

Static and Dynamic Latch-Up

■

LU: 3 complementary static tests are required on 10 parts to assess the latch-up

performance. A supply overvoltage (applied to each power supply pin) and a current

injection (applied to each input, output and configurable I/O pin) are performed on each

sample. This test conforms to the EIA/JESD 78 IC latch-up standard. For more details,

refer to the application note AN1181.

■

DLU: Electrostatic discharges (one positive then one negative test) are applied to each

pin of 3 samples when the micro is running to assess the latch-up performance in dynamic

mode. Power supplies are set to the typical values, the oscillator is connected as near as

possible to the pins of the micro and the component is put in reset mode. This test

conforms to the IEC1000-4-2 and SAEJ1752/3 standards. For more details, refer to the

application note AN1181.

Table 17.

EMI characteristics

Symbol Parameter

Conditions

Monitored

Frequency

Band

Max vs.

Unit

Peak level

1.

Refer to Application Note AN1709 for data on other package types.

0.1 to 30 MHz

20

dBµV

30 to 130 MHz

25

130 MHz to 1

GHz

25

SAE EMI Level

4

-

Table 18.

Absolute maximum ratings

Symbol

Ratings

Conditions

Maximum

1.

Data based on characterization results, not tested in production.

Unit

Electrostatic discharge voltage

(Human Body Model)

2000

V